Add windows support to normalizePath

This is probably still not 100% sure and there are still many bugs with
FS on windows. But it's a slight improvement.

Fixes #1226

1 files changed, 55 insertions, 0 deletions

diff --git a/uri.go b/uri.go
index 62974df..38a431e 100644
--- a/uri.go
+++ b/uri.go
@@ -5,6 +5,7 @@ import (
 	"errors"
 	"fmt"
 	"io"
+	"path/filepath"
 	"strconv"
 	"sync"
 )
@@ -634,6 +635,60 @@ func normalizePath(dst, src []byte) []byte {
 		b = b[:nn+1]
 	}
 
+	if filepath.Separator == '\\' {
+		// remove \.\ parts
+		b = dst
+		for {
+			n := bytes.Index(b, strBackSlashDotBackSlash)
+			if n < 0 {
+				break
+			}
+			nn := n + len(strSlashDotSlash) - 1
+			copy(b[n:], b[nn:])
+			b = b[:len(b)-nn+n]
+		}
+
+		// remove /foo/..\ parts
+		for {
+			n := bytes.Index(b, strSlashDotDotBackSlash)
+			if n < 0 {
+				break
+			}
+			nn := bytes.LastIndexByte(b[:n], '/')
+			if nn < 0 {
+				nn = 0
+			}
+			n += len(strSlashDotDotBackSlash) - 1
+			copy(b[nn:], b[n:])
+			b = b[:len(b)-n+nn]
+		}
+
+		// remove /foo\..\ parts
+		for {
+			n := bytes.Index(b, strBackSlashDotDotBackSlash)
+			if n < 0 {
+				break
+			}
+			nn := bytes.LastIndexByte(b[:n], '/')
+			if nn < 0 {
+				nn = 0
+			}
+			n += len(strBackSlashDotDotBackSlash) - 1
+			copy(b[nn:], b[n:])
+			b = b[:len(b)-n+nn]
+		}
+
+		// remove trailing \foo\..
+		n := bytes.LastIndex(b, strBackSlashDotDot)
+		if n >= 0 && n+len(strSlashDotDot) == len(b) {
+			nn := bytes.LastIndexByte(b[:n], '/')
+			if nn < 0 {
+				return append(dst[:0], strSlash...)
+			}
+			b = b[:nn+1]
+		}
+	}
+
 	return b
 }